Digital security expert Dr Suelette Dreyfus says consultancy company Cambridge Analytica used specifically targetted propaganda-style videos to influence the outcome of the US election. Facebook Chief Executive Mark Zuckerberg is facing calls from US and European politicians to explain how the company gained improper access to data on 50 million Facebook users. In response to the scandal, Facebook's shares closed down nearly 7 per cent, wiping nearly $US40 billion off its market value.

The royal commission into the financial services sector continues, with senior executives from Commonwealth Bank being asked hard-hitting questions about its consumer credit insurance products. CBA has admitted it was too slow to address insurance issues affecting 200,000 credit card and loan customers, but has denied it tried to 'sweep aside' the problems.